Home / 80,132.10-120,198.15-42,807.30

Finding the Fourth Proportional to 80,132.10, 120,198.15 and 42,807.30

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Solution

The fourth proportional to 80,132.10, 120,198.15 and 42,807.30 is: 64,210.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,132.10 : 120,198.15 = 42,807.30 : x
  2. Step 2: Convert to fraction form
    80,132.10/120,198.15 = 42,807.30/x
  3. Step 3: Cross multiply
    80,132.10x = 120,198.15 × 42,807.30
  4. Step 4: Simplify right side
    80,132.10x = 5,145,358,266.50
  5. Step 5: Solve for x
    x = 5,145,358,266.50/80,132.10
  6. Step 6: Final answer
    x = 64,210.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.